Benthic nutrient fluxes and sediment oxygen consumption in a full-scale facultative pond in Patagonia, Argentina

Abstract

The study of benthic metabolism is an interesting tool to understand the process that occurs in bottom water at wastewater stabilization ponds. Here, rates of benthic oxygen consumption and nutrient exchange across the water-sludge interface were measured in situ using a benthic chamber. The research was carried out during autumn, winter, and summer at a municipal facultative stabilization pond working in a temperate region (Puerto Madryn city, Argentina).Both a site near the raw wastewater inlet (Inlet station) and a site near the outlet (Outlet station) were sampled. Important seasonal and spatial patterns were identified as being related to benthic fluxes. Ammonium release ranged from undetectable (autumn/summer -Inlet station) to . During the warmer months, the mineralization of organic matter from the bottom pond acts as a source of nutrients, which seem to support the important development of phytoplankton and nitrification activity recorded in the surface water. Bottom processes could be related to the advanced degree and efficiency of the treatment, the temperature, and probably the strong and frequent wind present in the region.M. Faleschini

Full‐scale maturation ponds working below a latitude of 43°S in a semiarid area: seasonal performance and removal mechanisms

“…). There was probably an internal recycling of nutrients from the sludge that maintained the phytoplankton population; this behaviour has been quantified in the facultative pond of Puerto Madryn (Faleschini & Esteves ).…”

Evaluasi Karakteristik Air Limbah Hasil Pengolahan Waste Stabilazion Pond di Kota Jakarta

“…Peningkatan konsentrasi amonia dalam air limbah dapat menyebabkan pertumbuhan alga (Septiariva and Suryawan, 2021). Sedimen WSP diketahui melepaskan nutrisi yang ada dalam detritus yang menetap dari waktu ke waktu, dengan jumlah pelepasan terkait dengan kandungan nutrisi di lapisan bentik (Faleschini and Esteves, 2013). Asimilasi-sedimentasi oleh alga memiliki peran utama dalam penghilangan nitrogen di WSP (Mayo and Abbas, 2014;Bastos, Rios and Sánchez, 2018).…”

Nitrogen dynamic in vitro using sludge of a sewage stabilization pond from Patagonia (Argentina)

“…NRR has also been studied in batch reactors inoculated with activated sludge cultures, with a previous acclimation procedure (Albina et al 2019). Moreover, many methods have been used to estimate the nitrogen dynamic in sediments: benthic chamber (Torres et al 2016;Faleschini and Esteves 2013), experiments using labeled nitrogen (Enrich-Prast et al 2016), in vitro incubation corer with sediment (Gardner et al 2006), the acetylene inhibition technique (Lindau et al 2011), and flow-through reactors (FTR) (Evrard et al 2013). The last method was developed by Northby (1976) and adapted for microbiological processes by Esteves et al (1986).…”